No, tried quoting. It seems the version of wget supplied in the busybox is very limited - hardly any options and an inability to pass parameters in the URL. Can't think of a way forward here apart from compiling a new version.

Instead of using wget I've compiled curl using adamb's virtual machine/VMWare image. Here's a copy of the binary for those of you that want something better than the inbuilt wget for fetching content on the iLiad.
See http://curl.haxx.se/docs/httpscripting.html for instructions.